This book includes original, peer-reviewed research papers from the 3rd Aerospace Frontiers Conference (AFC 2026), held in Beijing, China, on April 10–13, 2026. The topics covered include but are not limited to: Fluid Mechanics and Flight Mechanics, Solid Mechanics and Vehicle Conceptual Design, Electronics and Electrical Engineering and Control, Material Engineering and Mechanical Manufacturing, making the book a valuable asset for researchers, engineers, and university students alike.